Telecommunications – Transmitter – Amplitude modulation
Patent
1980-10-02
1982-06-22
Safourek, Benedict V.
Telecommunications
Transmitter
Amplitude modulation
375 22, 332 59, 330 11, 330207A, H03G 1104, H03C 106
Patent
active
043366155
ABSTRACT:
An AM broadcast transmitter uses a PWM modulator that requires a pulse width filter. It has been found that the filter load varies over the modulation cycle resulting in distortion. To overcome this problem, a varying voltage is applied to an RF driver stage during portions of the modulation cycle.
REFERENCES:
patent: 3335370 (1967-08-01), Wittig et al.
patent: 3413570 (1968-11-01), Bruene et al.
patent: 4178556 (1979-12-01), Attwood
Abt Richard F.
Behrend William L.
Chin Stephen
Meise William H.
Rasmussen P. J.
RCA Corporation
Safourek Benedict V.
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